simonw/tools

Assorted useful tools, almost entirely generated using LLMs

HTML

1,907

918 commits

updated Oct 6, 2026

tools.simonwillison.net

See the code

See what people are saying

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Most points

Source	Message	Score	Date
	That's a GitHub rate limit. Try again now, I just pushed a hopeful fix: https://github.com/simonw/tools/commit/7793fb74c2d37bd613cdc... on Mistral Large 4	0	Oct 6, 2026

README

tools.simonwillison.net

Miscellaneous HTML+JavaScript tools built mostly with the help of LLMs. See also /python/ for tools written using Python.

This collection is an experiment in prompt-driven development with very low stakes.

The colophon lists commit messages and transcripts for every tool.

The code lives in simonw/tools and many tools used the Claude custom instructions described here.

Significant stargazers

(top 24 of 33)

Christian Oliff

558 followers · starred Nov 2024

Pelle Wessman

602 followers · starred May 2026

Cosimo Lupo

453 followers · starred Dec 2025

Andrew Nesbitt

3,671 followers · starred Aug 2026

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simonw/tools

Assorted useful tools, almost entirely generated using LLMs

HTML

1,907

918 commits

updated Oct 6, 2026

tools.simonwillison.net

See the code

See what people are saying

Newest first

Most points

Source	Message	Score	Date
	That's a GitHub rate limit. Try again now, I just pushed a hopeful fix: https://github.com/simonw/tools/commit/7793fb74c2d37bd613cdc... on Mistral Large 4	0	Oct 6, 2026

README

tools.simonwillison.net

Miscellaneous HTML+JavaScript tools built mostly with the help of LLMs. See also /python/ for tools written using Python.

This collection is an experiment in prompt-driven development with very low stakes.

The colophon lists commit messages and transcripts for every tool.

The code lives in simonw/tools and many tools used the Claude custom instructions described here.

Similar repos

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A Collection of tools that i built and decided to make it public!

0xeb/TheBigPromptLibrary

A collection of prompts, system prompts and LLM instructions

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chuanqisun/memo

A personal knowledge base, a Today I Learned (TIL) journal, A Second brain. Automated with…

Uvacoder/aaa-bookmarks-chuanqisun-collect

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Significant stargazers

(top 24 of 33)

Christian Oliff

558 followers · starred Nov 2024

Pelle Wessman

602 followers · starred May 2026

Cosimo Lupo

453 followers · starred Dec 2025

Andrew Nesbitt

3,671 followers · starred Aug 2026